Fix loading of rollback installed workloads in Visual Studio (#39901)

Author: marcpopMSFT

src/Microsoft.DotNet.TemplateLocator/Microsoft.DotNet.TemplateLocator.csproj

@@ -58,8 +58,11 @@
     <EmbeddedResource Include="..\Resolvers\Microsoft.NET.Sdk.WorkloadManifestReader\Strings.resx" LinkBase="Resources" GenerateSource="True" Namespace="Microsoft.NET.Sdk.Localization"/>
   </ItemGroup>
 
+  <ItemGroup Condition="'$(TargetFrameworkIdentifier)' == '.NETFramework'">
+    <PackageReference Include="System.Text.Json"  VersionOverride="8.0.0" />
+  </ItemGroup>
+
   <ItemGroup>
-    <PackageReference Include="System.Text.Json" Condition="'$(UseSystemTextJson)'=='True'"/>
     <PackageReference Include="Newtonsoft.Json" Condition="'$(UseSystemTextJson)'!='True'"/>
   </ItemGroup>
 </Project>

src/Resolvers/Microsoft.DotNet.MSBuildSdkResolver/Microsoft.DotNet.MSBuildSdkResolver.csproj

@@ -91,6 +91,7 @@
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFrameworkIdentifier)' == '.NETFramework'">
+    <PackageReference Include="System.Text.Json"  VersionOverride="8.0.0" />
     <Reference Include="System" />
     <Reference Include="System.Core" />
     <PackageReference Include="Microsoft.VisualStudio.Setup.Configuration.Interop" PrivateAssets="All" ExcludeAssets="Runtime" />